Device for arresting the explosion discharge from blast-furnaces.



No. 868,102. PATENTED OCT. 15, 1907? Y L. LARSSON. h DEVICE FORARRESTING THE EXPLOSION DISCHARGE FROM BLAST FURNACES.

APPLICATION FILED JUN 12, 1907.

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LARS LARSSON, OF CHICAGO, ILLINOIS.

DEVICE FOR ARRESTING THE EXPLOSION DISCHARGE FROM BLAST-FURNACES.

Specification of Letters Patent.

Patented Oct. 15, 1907.

Application filed June 12,1907. Serial No. 378,607.

To all whom it may concern:

Be it known that I, LriRS LARSSON, a citizen of the United States,residing at 7 915 Muskegon avenue, in the city of Chicago, county ofCook, and State of Illi nois, have invented certain new and usefulImprovements in Devices for Arresting the Explosion Discharge fromBlastFurnaces, of which the following is a specification.

My invention relates to blast furnaces and has particular reference todevices such as are adapted for use upon blast furnaces to arrest thematerial which is discharged at each explosion therein.

The object of my invention is to provide a device of the class mentionedfor blast furnace, to arrest the pieces of coke, stones and cindersthrown off by the internal explosions which occur at each slippage ofthe molten or semi-molten mass within the furnace. At such times a largequantity of coke, etc., is thrown off through the explosion pipes andscattered widely about the furnace.

My invention consists generally in a large metal cage supported abovethe furnace and into which the explosion pipes discharge. The walls, andpreferably the top also, are formed of coarse mesh grating, suitablyreinforced to prevent injury from the large pieces of coke or stoneejected forcibly against them. The bottom is hopper or funnel shaped toreceive the ejected material and empty it into a discharge pipe whichreaches nearly to the ground.

My invention also consists in various constructions, arrangements andcombination of parts, all as will be fully described hereinafter.

My invention will be more readily understood by reference to theaccompanying drawings forming a part of this specification and in which,

Figure 1, is a side elevation of a discharge arr-ester embodying myinvention in its preferred form, Fig. 2, is a horizontal section on theline, 22, of Fig. 1, Fig. 3, is a detail section of one side of a panelof grating and its reinforcement, Fig. 4, is a detail of one end of thepanel of grating, and Fig. 5, is a similar view of the reinforcingmember.

Referring to the drawings, 1, indicates the top of a blast furnace, and2, the fuel feed hopper equipped with the usual bell feed, (not shown).Projecting from the sides of the furnace, and extending quite a distanceabove the top thereof, are the explosion pipes, 3. These are of theusual type, and any desired number may be provided. In the drawings, Ihave illustrated four.

During the melting of the ore in the furnace, the mass therein slipsdown at intervals, due to the liquefaction of thebottom portion thereof.At each such slippage there occurs an explosion of the pent gases, whichthrows off great quantities of coke, stone and Cinders through thepipes, 3, said pipes acting in the nature of safety valves to preventrupture of the furnace. It is to prevent the scattering of thismaterial, and to gather the same into a convenient pile for future use,that I provide the novel device forming the subject matter of thisapplication.

Supported upon a suitable, frame, 4, arranged upon the top of thefurnace, is a cage, 5, into which the explosion pipes, 3, discharge. Thecage, 5, may be of any preferred construction, but I prefer the same tohave the form of a rectangular box, constructed of the ordinarystructural steel. The sides, and preferably the top, are divided intopanels, 6, which are filled in with frames of coarse grating, 7,reinforced by other frames, formed of steel bars rigidly spaced apart.reinforcing gratings each comprise a rectangular frame, 8, in which arearranged a plurality of steel bars, 9. The bars, 9, are arranged uponrods, 10, passing trans versely through the frame, and are spaced apartby short sections of tubing or pipe, 11, arranged upon the rods, 10, andbetween the bars as shown in Fig. 3, wherein 6 indicates one of themembers, which divide the sides of the cage into panels, and to whichthe gratings, 7 and 8 are fixed.

The bottom, 12, of the cage is funnel or hopper shaped, and empties intoa large discharge pipe, 13, which may extend nearly to the ground. 14indicates an automatic fuel feeding device, by means of which fuel isplaced in the hopper, 12. If necessary the bottom, 12 of the cage may beformed as shown to provide a hood, 15 over the fuel feed, 14, or overthe gangway, (not shown), if the furnace is filled by hand.

It is obvious that numerous modifications of my in? vention may be madewithout departing from the scope thereof, hence, I do not limit myselfto the precise construction shown and described.

Having described my invention what I claim as new and desire to secureby Letters Patent is,

1. In a device of the class described, a furnace having the usualexplosion pipes, in combination with a cage arranged above said furnaceand into which said explosion pipes discharge and a discharge pipeextending from said cage, substantially as described.

2. In a device of the class described, a furnace having the usualexplosion pipes, in combination with a cage arranged above said furnace,and into which said explosion The pipes discharge, a funnel shapedbottom for said cage, and a discharge pipe leading from said cage,substantially as described.

3. In a device of the class described, a blast furnace, having the usualexplosion pipes, in combination with a cage arranged above said furnaceand into which said pipes discharge the sides, and top of said cagebeing divided into a plurality of panels, a coarse mesh grating closingeach of said panels, and a reinforcing device for said grating, a funnelshaped bottom for said cage, and a 10 discharge pipe leading therefrom,substantially as described. I

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing Witnesses.

LABS LARSSON.

Witnesses HELEN F. LILLIs, H. S. AUSTIN.

